Facebook CEO Mark Zuckerberg, 33, has earned $4.16 billion since 2018 began, with company shares climbing more than 5%.That’s been enough to vault Zuckerberg from 5th to 4th on Bloomberg‘s billionaires list (where he’s been as recently as 2016). He’s now worth nearly $77 billion.Yet, in a Facebook post last week, Zuckerberg seemed to express concern about his company’s status.“With the rise of a small number of big tech companies—and governments using technology to watch their citizens—many people now believe technology only centralizes power rather than decentralizes it,” he wrote. He added he also hopes to better enforce Facebook’s posting policies and reduce abuse.